The School Management System – WPSchoolPress plugin for WordPress is vulnerable to Privilege Escalation due to a missing capability check on the wpsp_UpdateTeacher() function in all versions up to, and including, 2.2.16. This makes it possible for authenticated attackers, with teacher-level access and above, to update arbitrary user details including email which makes it possible to request a password reset and access arbitrary user accounts, including administrators.
The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.